Solder paste dispensing laser welding equipment

Abstract

The utility model belongs to the technical field of laser welding, and particularly relates to solder paste dispensing laser welding equipment which comprises a machine table, two Y-axis moving mechanisms and a support are symmetrically and fixedly connected to the machine table, and a first XZ-axis moving mechanism and a second XZ-axis moving mechanism are fixedly connected to the two sides of the support correspondingly. The Z-axis moving end of the first XZ axial moving mechanism is fixedly connected with a tin dispensing welding unit, and the Z-axis moving end of the second XZ axial moving mechanism is fixedly connected with a laser welding part. The electric heating piece is arranged outside the paste extruding pipe, the solder paste in the paste extruding pipe is heated through the electric heating piece, the solder paste is kept at the proper temperature all the time, the situation that the extrusion effect is affected and discharging is not smooth due to the fact that the viscosity of the solder paste changes is avoided, and the solder paste extrusion stability and the welding stability are guaranteed.

Description

Technical Field

[0001] The present application relates to the field of laser welding technology, and specifically to solder paste laser welding equipment. Background Art

[0002] Solder paste spot welding is to apply solder paste in the form of small dots at specific locations on the circuit board to form solder points, and then achieve welding through laser welding. This equipment can accurately heat and melt the solder paste through laser, so that it can form a reliable welding connection at the welding part.

[0003] The prior art (Chinese invention patent publication number CN109175566A) discloses a device with automatic solder paste dispensing and laser welding functions. Although the device is equipped with a solder paste dispensing device and a welding device to achieve the functions of solder paste dispensing and welding, it does not have the function of heating the solder paste and cannot ensure that the temperature of the solder paste is at an appropriate level. As a result, the viscosity of the solder paste may change, affecting the extrusion effect and causing unsmooth discharge. Summary of the Invention

[0004] The purpose of this application is to provide a solder paste laser welding device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present application provides the following technical solutions: solder paste spot laser welding equipment, including a machine platform, on which two Y-axial moving mechanisms and a bracket are symmetrically fixed, and an XZ axial moving mechanism 1 and an XZ axial moving mechanism 2 are respectively fixed on both sides of the bracket, a solder paste spot welding unit is fixed on the Z-axis moving end of the XZ axial moving mechanism 1, and a laser welding part is fixed on the Z-axis moving end of the XZ axial moving mechanism 2.

[0006] In one embodiment, the spot tin welding unit includes a mounting plate fixedly connected to the Z-axis moving end of the XZ axial moving mechanism, an electric push rod and a paste extrusion tube fixedly connected to one side of the mounting plate, an electric heating element fixedly connected to the inside of the paste extrusion tube, a tin discharge needle fixedly connected to the lower end of the paste extrusion tube, and a piston inserted into the inside of the paste extrusion tube and connected to the telescopic end of the electric push rod.

[0007] In one embodiment, a CCD is further fixedly connected to one side of the mounting plate.

[0008] In one embodiment, a controller connected to a spot tin welding unit is fixedly connected to the upper end of the bracket.

[0009] In one embodiment, a smoke extraction pipe is further fixedly connected to the Z-axis moving end of the second XZ-axis moving mechanism.

[0010] In one embodiment, a safety light grid is further connected to the upper end of the machine platform.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] The present application provides an electric heating element on the outside of the paste extrusion tube, which heats the solder paste inside the paste extrusion tube so that the solder paste is always kept at a suitable temperature, avoiding changes in the viscosity of the solder paste that affect the extrusion effect and discharge smoothness, and ensuring the stability of solder paste extrusion and welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a front perspective diagram of this application;

[0014] Figure 2 This is a three-dimensional schematic diagram of the back of this application;

[0015] Figure 3 This is a schematic diagram of the tin soldering unit structure of this application;

[0016] Figure 4 This is a structural diagram of the smoking tube and laser welding part of this application.

[0017] In the figure: 1. Machine table; 2. Y-axis moving mechanism; 3. Safety light barrier; 4. Bracket; 5. XZ-axis moving mechanism 1; 6. Spot soldering unit; 61. Mounting plate; 62. Paste extrusion tube; 63. Desoldering needle; 64. CCD; 65. Electric push rod; 7. XZ-axis moving mechanism 2; 8. Smoke extraction tube; 9. Laser welding unit; 10. Controller. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0019] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Example

[0020] See also Figure 1-4, the present application provides a technical solution: a spot solder paste laser welding device, comprising a machine 1, the upper end of the machine 1 is also connected to a safety grating 3, the machine 1 is symmetrically fixed with two Y-axial moving mechanisms 2 (the two Y-axial moving mechanisms 2 are used to transport the workpiece to be welded fixed on the jig, and move the workpiece to the bottom of the spot tin welding unit 6 and the laser welding part 9) and a bracket 4, and the two sides of the bracket 4 are respectively fixed with an XZ axial moving mechanism 1 5 and an XZ axial moving mechanism 2 7, the Z-axis moving end of the XZ axial moving mechanism 1 5 is fixed with the spot tin welding unit 6, the XZ axial moving mechanism 1 5 is used to drive the spot tin welding unit 6 to move in the XZ axial direction and adjust its XZ axial position, the Z-axis moving end of the XZ axial moving mechanism 2 7 is fixed with a laser welding part 9 (laser welding head, laser welding is a mature existing technology, which will not be described here), the XZ axial moving mechanism 2 7 is used to drive the laser welding part 9 to move in the XZ axial direction and adjust its XZ axial position.

[0021] The spot tin soldering unit 6 includes a mounting plate 61 fixedly connected to the Z-axis moving end of the XZ axial moving mechanism 5, an electric push rod 65 and a paste extrusion tube 62 fixedly connected to one side of the mounting plate 61, an electric heating element fixedly connected to the inside of the paste extrusion tube 62, a tin discharge needle 63 fixedly connected to the lower end of the paste extrusion tube 62, and a piston inserted into the inside of the paste extrusion tube 62 and connected to the telescopic end of the electric push rod 65. The upper end of the bracket 4 is fixedly connected to a controller 10 connected to the spot tin soldering unit 6. The electric push rod 65 is controlled by the controller 10 to operate. When the telescopic end of the electric push rod 65 is extended or retracted, it can drive the piston to move inside the paste squeezing tube 62. When the piston descends in the paste squeezing tube 62, the solder paste inside the paste squeezing tube 62 can be discharged from the tin discharge needle 63, thereby realizing the solder paste squeezing action. The solder paste inside the paste squeezing tube 62 is heated by the electric heating element (electric heating wire, a commonly used electric heating element) to keep the solder paste at a suitable temperature at all times, thereby preventing changes in the solder paste viscosity from affecting the extrusion effect and causing unsmooth discharge, thereby ensuring the stability of solder paste extrusion and welding stability.

[0022] In one embodiment, a CCD64 is fixedly connected to one side of the mounting plate 61. The CCD64 can identify the position of the workpiece and determine whether the workpiece is offset. It can also identify the squeezed paste and determine whether too much or too little is squeezed. CCD image recognition detection is a mature existing technology and will not be described in detail here.

[0023] A smoke extraction pipe 8 is also fixedly connected to the Z-axis moving end of the second XZ-axis moving mechanism. The smoke extraction pipe 8 is connected to the fume purifier through a pipeline. The welding fume generated during welding can be sucked into the fume purifier through the smoke extraction pipe 8 to prevent the welding fume from floating out.

[0024] The above shows and describes the basic principles, main features and advantages of the present application. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic features of the present application; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present application is limited by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present application, and any figure marks in the claims should not be regarded as limiting the claims involved.

[0025] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A solder paste laser welding device, comprising a machine (1), characterized in that: Two Y-axis moving mechanisms (2) and a bracket (4) are symmetrically fixed on the machine (1), and an XZ-axis moving mechanism (5) and an XZ-axis moving mechanism (7) are fixed on both sides of the bracket (4), a tin-dot welding unit (6) is fixed on the Z-axis moving end of the XZ-axis moving mechanism (5), and a laser welding part (9) is fixed on the Z-axis moving end of the XZ-axis moving mechanism (7).

2. The solder paste laser welding equipment according to claim 1, characterized in that: The spot tin soldering unit (6) comprises a mounting plate (61) fixedly connected to the Z-axis moving end of the XZ axial moving mechanism (5), an electric push rod and a paste extrusion tube (62) fixedly connected to one side of the mounting plate (61), an electric heating element fixedly connected to the inside of the paste extrusion tube (62), a tin discharge needle (63) fixedly connected to the lower end of the paste extrusion tube (62), and a piston inserted into the inside of the paste extrusion tube (62) and connected to the telescopic end of the electric push rod.

3. The solder paste laser welding equipment according to claim 2, characterized in that: A CCD (64) is also fixedly connected to one side of the mounting plate (61).

4. The solder paste laser welding equipment according to claim 3, characterized in that: A controller (10) connected to the spot tin welding unit (6) is fixedly connected to the upper end of the bracket (4).

5. The solder paste laser welding equipment according to claim 4, characterized in that: A smoke extraction pipe (8) is also fixedly connected to the Z-axis moving end of the second XZ axial moving mechanism.

6. The solder paste laser welding equipment according to claim 5, characterized in that: The upper end of the machine (1) is also connected to a safety grating (3).

Images